Williams Fork Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Williams Fork Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Williams Fork Reservoir today is 20.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 26 | 19.5°C | 21.0°C | |
| AUG 27 | 21.1°C | 21.0°C | |
| AUG 28 | 21.0°C | 21.0°C | |
| AUG 29 | 21.0°C | 21.0°C | |
| AUG 30 | 20.9°C | 21.0°C | |
| AUG 31 | 20.8°C | 21.0°C | |
| SEP 1 | 20.9°C | 19.0°C | |
| SEP 2 | 20.3°C | 19.0°C | |
| SEP 3 | 19.0°C | 20.2°C | |
| SEP 4 | 19.0°C | 20.2°C | |
| SEP 5 | 19.0°C | 20.1°C | |
| SEP 6 | 19.0°C | 20.0°C | |
| SEP 7 | 19.0°C | 20.0°C | |
| SEP 8 | 19.0°C | 19.9°C | |
| SEP 9 | 19.0°C | 19.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 4°C | 10°C | 15°C |
| February | 3°C | 9°C | 14°C |
| March | 4°C | 9°C | 14°C |
| April | 4°C | 10°C | 15°C |
| May | 5°C | 13°C | 20°C |
| June | 10°C | 16°C | 21°C |
| July | 16°C | 21°C | 25°C |
| August | 17°C | 21°C | 25°C |
| September | 16°C | 19°C | 22°C |
| October | 10°C | 15°C | 20°C |
| November | 6°C | 11°C | 16°C |
| December | 5°C | 9°C | 12°C |
Williams Fork Reservoir: Water Temperature by Location
Williams Fork Reservoir: Weather Forecast
September 3
September 4
September 5
September 6
September 7
September 8
Location & Local Information
Williams Fork Reservoir is a high‑elevation body of water, so its surface temperatures stay fairly cool most of the year. In spring, as snowmelt fills the lake, surface readings commonly range from about 35–50°F (2–10°C). Summer brings the warmest conditions, with typical surface temperatures in the mid‑50s to upper‑60s °F (13–20°C) on warm sunny days; even then, temperatures rarely climb into the mid‑70s. By fall the reservoir cools back to roughly 40–55°F (4–13°C) as air temperatures drop, and in winter the lake often approaches freezing at the surface (around 32°F / 0°C) and may ice over in sustained cold spells. Deeper water remains colder year‑round, and thermal stratification means surface warmth is shallow and short‑lived.
Swimming at Williams Fork Reservoir is possible but limited in practice. There are no widespread, warm‑water swimming conditions most of the year, and the cold surface temperatures, risk of cold shock, sudden weather changes, and motorboat traffic make prolonged or unsupervised swimming hazardous. Local access points and rules can vary, so visitors who choose to enter the water typically do so briefly in the warmest weeks, use wetsuits or flotation, and stay close to shore. Because of these safety and comfort factors, recreation at the reservoir tends to focus more on boating and fishing than on leisure swimming.